Seung Sik Choi

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—Wireless sensor networks consist of sensor nodes which are expected to be battery-powered and are hard to replace or recharge. Thus, reducing the energy consumption of sensor nodes is an important design consideration in wireless sensor networks. For the implementation of an energy-efficient MAC protocol, a Sensor-MAC based on the IEEE 802.11 protocol,(More)
We developed a reliable mobile Peer-to-Peer (P2P) data sharing system and performed some experiments for verifying our routing scheme using our real testbed. Our method for guaranteeing reliable P2P data sharing mainly deals with the problem of disconnection due to the sudden disappearance of one or more nodes involved in the active transmission route. The(More)
A Fair Queueing Algorithm is proposed for data services in an integrated voice/data CDMA system. After delay-sensitive voice users are allocated first, then residual resources are allocated to data users according to the throughput maximization strategy. In order to fairly allocate data users, we use power resource concept which considers the BER and the(More)